The line at the end describing about the error thrown can be worded better.

If the process times out, or has a non-zero exit code, this method will throw. The Error object will contain the entire result from child_process.spawnSync()

Should be something like:

If the process times out, or has a non-zero exit code, this method will throw an Error object which will contain the entire result from child_process.spawnSync()

https://nodejs.org/api/child_process.html#child_process_child_process_execsync_command_options

[refack adding]